Privacy Policy
This page explains what StatCalcs does and does not collect. In short: the calculators run entirely in your browser, and we do not ask you to create an account or hand over personal data to use them.
What stays on your device
The numbers you type into a calculator are processed in your browser and are not sent to us. If you choose to save inputs or preferences (for example, dark mode), those are stored in your browser using local storage, on your device only. Clearing your browser data removes them.
Analytics
Hosting logs. StatCalcs is served as static files from a content delivery network. Your browser connects to our host's servers to download the HTML, CSS and JavaScript that make the site work. That connection may involve your IP address being recorded in standard server access logs, as is normal for any website. We do not access or process those logs to track visitors.
Cloudflare Web Analytics. StatCalcs uses Cloudflare Web Analytics to count page views and see which calculators are visited. It is cookieless: it sets no cookies and stores no identifier on your device, and it does not follow you across websites. It records page views, the referring page, your approximate country, your browser and operating system, and page-load performance measurements collected through your browser's Performance API. Because it stores nothing on your device, it is not part of the consent banner and it runs whether or not you accept Microsoft Clarity. Cloudflare retains the unsampled measurements for about seven days and then aggregates them. Cloudflare's Privacy Policy applies to their processing. Any content blocker that blocks cloudflareinsights.com will stop it loading, and every calculator works normally without it.
Microsoft Clarity. With your consent, StatCalcs also uses Microsoft Clarity, a behavioural analytics service, to understand how the calculators are used so we can improve them. Clarity collects heatmaps, session recordings, and interaction data such as clicks, scrolling, rage clicks, page performance, and browser and device characteristics. It sets first-party cookies (_clck and _clsk) to link page views into a single session. We also send Clarity three custom events per calculator, recording that a calculation was completed, that a result was copied, and that a result was shared. These events record the action, never the numbers involved.
What Clarity cannot see. The figures you type and the results they produce are marked with Microsoft's masking attribute and are redacted before anything leaves your browser. They are never transmitted to Microsoft or to us. Clarity also masks the contents of input fields in all of its masking modes.
Your location and IP address. Clarity uses IP-based geolocation to approximate which country or region a visit came from. Microsoft states that Clarity does not store complete IP addresses and uses partial or obfuscated addresses for this purpose.
How to opt out. Any one of the following is enough:
- Use the site's own control. Select Cookie preferences in the footer of any page to turn analytics on or off at any time. Turning it off deletes the Clarity cookies already stored in your browser and stops further collection.
- Send a Global Privacy Control (GPC) or Do Not Track (DNT) signal. If your browser or an extension sends either signal, StatCalcs does not load Clarity at all.
- Block the script. Any content blocker that blocks
clarity.mswill stop Clarity loading. Every calculator keeps working without it.
Where you are matters. If you are visiting from the European Economic Area, the United Kingdom or Switzerland, Clarity is not loaded and no cookies are set until you press Accept. Everywhere else, analytics runs by default and you are shown a notice with a one-click way to turn it off. In all regions, GPC and DNT signals are honoured before anything else is considered.
Microsoft as a recipient. When you consent, the data described above is transmitted to and stored by Microsoft on Azure infrastructure. Microsoft is an independent controller of that data and may use it in accordance with the Microsoft Privacy Statement, which applies to their processing. Clarity retains session data for a limited period, currently around 30 days.
Cloudflare Web Analytics and Microsoft Clarity are the only analytics services we use. We run no other analytics platform and no other tracking script.
Your rights
Where we rely on your consent to run analytics, you may withdraw it at any time, and as easily as you gave it, using the Cookie preferences link in the footer of any page. Withdrawing consent does not affect the lawfulness of processing carried out beforehand.
If you are in the European Economic Area, the United Kingdom or Switzerland, you have the right under the GDPR, UK GDPR or FADP to access, rectify, erase, restrict or object to the processing of personal data relating to you, and to lodge a complaint with your supervisory authority. If you are in Australia, the Australian Privacy Principles give you the right to access and correct personal information, and you may complain to the Office of the Australian Information Commissioner. If you are in California or another US state with a comprehensive privacy law, you may opt out of the sale or sharing of personal information; we do not sell or share personal information, and we honour the Global Privacy Control signal regardless. For data held by Microsoft rather than by us, please refer to the Microsoft Privacy Statement linked above.
Advertising
StatCalcs plans to display ads through Google AdSense to keep the tools free. Until AdSense is live, no advertising cookies are set. When ads go live, this section will describe the cookies AdSense uses and how to opt out via Google's ad settings.
Contact
Questions about privacy? Email hello@statcalcs.com. This policy may be updated, and the date of the current version will be shown here. Last reviewed July 2026.